Yamaha Outboard Parts
Yamaha   Yamaha Outboard Parts
 
Yamaha Outboard Forum Yamaha Outboard Parts Discussion Forum Yamaha Outboard Parts Boat Parts Yamaha Outboard Forum Outboard Motor Parts Contact Us
Yamaha Parts
  #16 (permalink)  
Old 1 Week Ago
Junior Member
 
Join Date: Mar 2017
Posts: 13
Default

Man this is getting frustrating.

Pulled the ASV and pushed the ball and spring out thinking that was a possibility. While there inspected the pickup tube. Seemed to be fine no cracks, splits etc. Also no screen on the end? Tank is 3 years old.

Hook it all back up(port motor port tank) and eventually the pump pulls the cap filter dry and starts pulling air. Swap over to alternate tank (Starboard tank -Port Motor)and the hoses stay full with the cap refilling after pump kicks on and off.
Put starboard motor on suspect tank(port) and you guessed it same thing emptied the filter hosing dry and began to pull air.

What the heck am i missing. Remember this all started because at idle (port motor-Port Tank) it would periodically shut off and i would have to pump the ball. Once primed will run all day from idle to 6k. If it was a fuel starve problem caused by the tank wouldn't it act the same at idle verse at cruise or WOT. I ran 25 miles at 4400-4600 rpm after pumping the ball with no issues.
Help-Red Snapper season just re opened!!!!
Reply With Quote
  #17 (permalink)  
Old 1 Week Ago
Senior Member
 
Join Date: Dec 1969
Location: middle Texas coast
Posts: 8,782
Default

what do you not understand about it sucking air instead of fuel?

you have a leak , find it
Reply With Quote
  #18 (permalink)  
Old 1 Week Ago
Junior Member
 
Join Date: Mar 2017
Posts: 13
Default

I understand an air leak........On the forum looking for possibilities.......
Reply With Quote
  #19 (permalink)  
Old 1 Week Ago
Senior Member
 
Join Date: Aug 2011
Location: Cape Coral, Florida
Posts: 4,983
Default

If you have an air compressor, close off all ends of the bad tank/filler, etc.

**If the pick up tube removes from the tank, pull it and do it on the bench.

If not, slightly pressurize the tank (blower tip and maybe a rag for a seal) (10-15 PSI).

Squirt a soapy solution or Windex over all piping, tubing, etc looking for bubbles. Bubble = crack/leak

Sounds like a hairline crack getting larger with time..
__________________
1997, Angler 20'4", Center Console with 2006 F150TXR
Reply With Quote
  #20 (permalink)  
Old 1 Week Ago
Junior Member
 
Join Date: Mar 2017
Posts: 13
Default

Good Idea-Thanks.... give it a whack and let you know.
Reply With Quote
  #21 (permalink)  
Old 1 Week Ago
Senior Member
 
Join Date: Mar 2013
Location: Sailfish Capitol of the World, Florida
Posts: 296
Default

How about full tank vs half tank. I was drinking a Coke the other day and my straw had a crack in it. It worked fine until I got half way done, then I started sucking air... I was as frustrated with my situation as you may be with yours!
__________________
If its got teats or tires, you bound to have trouble with it....
Reply With Quote
  #22 (permalink)  
Old 1 Week Ago
Member
 
Join Date: Jul 2016
Location: long island
Posts: 35
Default

I started my own post because I'm still having the same fuel issue . Last year I replaced The pressure release valve , so of course almost a year later I had the same issue happened again yesterday The VST tank ran out of fuel the motor died , The Ball was soft I was able to refill the VST tank with the primer ball and restart the motor and it ran fine let me know what you find out and maybe we could help each other I will be working on mine tomorrow
Reply With Quote
  #23 (permalink)  
Old 6 Days Ago
Junior Member
 
Join Date: Mar 2017
Posts: 13
Default

I caved in...

ADD TO THE LIST OF REPLACEMENT PARTS

pickup tube in the tank , elbow and ASV. Yamaha **** plated primer bulb, 3/8 hose from the tank to the engine, hose clamps and ......the low pressure fuel pump.

So all in all i have thrown the kitchen sink at it. I plan on running tomorrow.
Reply With Quote
  #24 (permalink)  
Old 6 Days Ago
Senior Member
 
Join Date: Aug 2011
Location: Cape Coral, Florida
Posts: 4,983
Default

Were you able to pressure test the pick up tube tube, etc?
__________________
1997, Angler 20'4", Center Console with 2006 F150TXR
Reply With Quote
  #25 (permalink)  
Old 6 Days Ago
Junior Member
 
Join Date: Mar 2017
Posts: 13
Default

Yes.

I called the tank manufacture and they walked me thru the test procedure. Pick up tube tested perfect.
Reply With Quote
  #26 (permalink)  
Old 6 Days Ago
Senior Member
 
Join Date: Aug 2011
Location: Cape Coral, Florida
Posts: 4,983
Default

Thanks... Was hoping you'd find something..

A suggestion, with the sea trial, should it still act up, pop/loosen the fuel filler cap (just in case it's not venting causing a vacuum-not likely).

Good luck.
__________________
1997, Angler 20'4", Center Console with 2006 F150TXR
Reply With Quote
  #27 (permalink)  
Old 6 Days Ago
Senior Member
 
Join Date: Dec 1969
Location: middle Texas coast
Posts: 8,782
Default

did you look at the filter seals and connections also.
only so many connections between tank and pump where you saw the bubbles
Reply With Quote
  #28 (permalink)  
Old 4 Days Ago
Junior Member
 
Join Date: Mar 2017
Posts: 13
Default

Ran 120 miles yesterday with no issues!

Before I left in the morning I changed the spin on yamaha filter on that motor. Other filter was only a couple of weeks old.

I quess that was it. Thanks for all the help and 99yam40 thanks for reminding me to check that filter again.
Reply With Quote
  #29 (permalink)  
Old 3 Days Ago
Senior Member
 
Join Date: Aug 2011
Location: Cape Coral, Florida
Posts: 4,983
Default

Great!

Cut up the primer bulb and see if the valves are damaged / gooed up, etc. Just for S&G's and you know if the issue was in there..
__________________
1997, Angler 20'4", Center Console with 2006 F150TXR
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


All times are GMT -4. The time now is 06:16 PM.

Outboard Parts

Other Forums
Mercury Parts
Suzuki Parts
Evinrude Parts
Johnson Parts
Honda Parts

Copyright 2000 - 2017, Outdoor Network LLC